ITB22-038B

Classification:
Reference:
EM22-007B
Date:
ITB22-038B
August 4, 2023
TURBOCHARGER REPLACEMENT PROCEDURE
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES:
2016-2023 Q50 (V37)
2017-2022 Q60 (CV37)
APPLIED ENGINES:
VR30DDTT
SERVICE INFORMATION
If either one or both turbochargers require replacement, refer to the SERVICE
PROCEDURE in this bulletin for the updated procedure.
IMPORTANT: You MUST closely follow the entire SERVICE PROCEDURE as it contains
information that is essential to successfully completing this repair.

2016-2017 Q50 and 2017 Q60 will require an ECM reprogramming at the end of
this SERVICE PROCEDURE for Turbocharger Exhaust Gas Temperature Sensor
deletion. Refer to ITB17-050.
Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. HINT: If you believe that a described condition may apply to a particular vehicle, DO NOT
assume that it does. See your Infiniti retailer to determine if this applies to your vehicle.
1/62
SERVICE PROCEDURE
Remove Driveline
IMPORTANT: The following Figures are of an AWD vehicle; 2WD is similar.
1.
Place the vehicle on a lift that will allow the drivetrain to be removed.
2.
Remove the Engine Cover.

3.
Refer to the ESM: REPAIR > ENGINE > ENGINE MECHANICAL > REMOVAL
AND INSTALLATION > ENGINE COVER
Remove the Cowl Top Cover RH and Cowl Top Cover LH.

Refer to the ESM: REPAIR > BODY EXTERIOR, DOORS, ROOF & VEHICLE
SECURITY > EXTERIOR > REMOVAL AND INSTALLATION > COWL TOP
4.
Disconnect the battery cable from the negative terminal.
5.
Remove the cover from the battery positive terminal.
6.
Disconnect the battery cable from the positive terminal.
7.
Release the fuel pressure.
f
To avoid the risk of death or severe personal injury, work in a well-ventilated area to
prevent gasoline vapors from accumulating and to prevent their possible ignition.

Refer to the ESM: DIAGNOSIS > ENGINE > ENGINE CONTROL SYSTEM >
BASIC INSPECTION > ENGINE CONTROL SYSTEM > FUEL PRESSURE
CHECK
2/62
ITB22-038B
8.
Disconnect the wiring harness connector shown in Figure 1.
9.
Roll up the wiring harness dust boot (Figure 1).
Wiring harness
connector
Dust boot
Figure 1
10.
Disconnect the Engine Control
Harness connector from the Engine
Room Harness connector (Figure 2),
located under the dust boot.
Engine Control Harness to Engine
Room Harness connectors
Figure 2
11.
Disconnect the wiring harness connector shown in Figure 3.

12.
Located directly behind the battery.
Detach the two (2) engine control harness mounting clips (Figure 3).
Wiring harness
connector
Wiring harness
mounting clips (2)
Figure 3
3/62
ITB22-038B
13.
Detach the Engine Control Harness
grommet from the bulkhead.
Engine Control
Harness grommet
Figure 4
Vacuum Hose 1
14.
Vacuum piping
Disconnect Vacuum Hose 1 from the
vacuum piping (Figure 5), and then
detach its grommet from the bulkhead.
Grommet
Figure 5
15.
Disconnect the three (3) ECM wiring harness connectors.
ECM wiring
harness
connectors (3)
Figure 6
4/62
ITB22-038B
16.
Disconnect the three (3) wiring harness connectors shown in Figure 7.
Wiring harness
connectors (3)
Figure 7
17.
Positive battery
cable nut
Remove the positive battery cable nut,
and then remove the positive battery
cable from the battery terminal with
fusible link.
Battery terminal
with fusible link
18.
Disconnect the engine wiring harness
from its mounting bracket.
19.
Detach the positive battery cable
grommet from the vehicle.
Positive battery
cable grommet
Figure 8
Positive
battery cable
Mounting
bracket
Figure 9
5/62
ITB22-038B
20.
Detach the body ground cable (Figure 10) and the engine ground cable (Figure 11).

The body ground cable is located on the driver (LH) side of the engine room inner
fender.

The engine ground cable is located on the front of the timing cover.
Body
ground cable
Engine
ground cable
Figure 10
Figure 11
21.
Remove all vehicle Under Covers.
22.
Drain the coolant from the radiator.
23.
Remove the two (2) bolts retaining the engine room wiring harness bracket shown in
Figure 12.
24.
Disconnect both the passenger (RH) side and the driver (LH) side heater hoses from
the engine.
Passenger (RH) side
heater hose
Figure 12
Driver (LH) side
heater hose
Figure 13
6/62
ITB22-038B
25.
Detach Fuel Feed Hose 2.
Fuel Feed Hose 2
Figure 14
26.
Disconnect Water Hose 1 from
Connector Pipe 3.
Connector Pipe 3
Water Hose 1
Figure 15
27.
Disconnect Water Hose 9 from Water
Pipe 3.
Water Pipe 3
Water Hose 9
Figure 16
7/62
ITB22-038B
28.
Remove the Air Duct (inlet), shown in Figure 17.

Eight (8) clips.
Air Duct (inlet)
Clips (8)
Figure 17
Reservoir Tank
Hose
29.
Disconnect the Radiator Hose (Upper)
and the Reservoir Tank Hose from the
Multi-way Control Valve.
Multi-way
Control Valve
Radiator Hose
(Upper)
Figure 18
Radiator Hose
(Upper)
30.
Disconnect the Radiator Hose (Upper)
from the radiator.
Radiator
Figure 19
8/62
ITB22-038B
31.
Unclip the first clip of the passenger (RH) side and the driver (LH) side Hood Side
Seal Assemblies, to allow access to the Air Cleaner Body (bank 1) and Air Cleaner
Body (bank 2) mounting bolts (Figure 20).
Hood Side Seal
Assemblies
Mounting bolt locations
Clips
Figure 20
32.
Disconnect both MAF sensor wiring harness connectors from the MAF sensors
(Figure 21), located on the Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2).
33.
Unclip the MAF sensor wiring harnesses from Air Cleaner Body (bank 1) and Air
Cleaner Body (bank 2).
34.
Unbolt both Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2); two (2) bolts
each where shown in Figure 21.
35.
Detach both Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2) from Air Duct
(bank 1) and Air Duct (bank 2), and then remove them from the vehicle.

Air Duct (bank 1) and Air Duct (bank 2) are located beneath Air Cleaner Body
(bank 1) and Air Cleaner Body (bank 2).
Air Cleaner
Body (bank 1)
Bolts (4)
MAF sensors
Air Cleaner
Body (bank 2)
Figure 21
9/62
ITB22-038B
36.
Place tape over Air Duct (bank 1) and Air Duct (bank 2) inlets, to prevent foreign
objects from entering the ducts.
To prevent engine damage, tape must be placed over both duct inlets. If foreign
debris enter either duct inlet, turbocharger damage and possibly engine damage may
occur.
37.
For vehicles that have an oil cooler, remove the two (2) bolts retaining Oil Cooler
Pipe 1 bracket to the vehicle (Figure 22 and Figure 23), located under the Air Cleaner
Body (bank 1).
Bolts (2)
Figure 23
Figure 22
High-Pressure
Flexible Hose
38.
Recover the A/C refrigerant using
approved equipment.
39.
Disconnect the High-Pressure Flexible
Hose from the condenser.

Bolt (1)
One (1) bolt.
Figure 24
10/62
ITB22-038B
Low-Pressure
Flexible Hose
40.
Disconnect the Low-Pressure Flexible
Hose from the Internal Heat
Exchanger Pipe.

One (1) bolt.
Bolt (1)
Figure 25
Radiator Hose
(lower)
41.
Detach the Radiator Hose (lower) and
the Reservoir Tank Hose from the
Multi-way Control Valve.
Reservoir
Tank Hose
Figure 26
11/62
ITB22-038B
The following Figures are of the passenger (RH) side AWD; driver (LH) side is similar.
HINT: 2WD is similar for steps 42-47.
42.
Raise the vehicle to a comfortable height, and then remove both front wheel
assemblies.
The following steps will be performed on
both passenger (RH) side and the driver
(LH) side.
43.
Brake caliper
assembly
Remove both front brake caliper
assemblies and rotors.
Brake rotor
HINT: Two (2) piston caliper shown in
Figure 27. Four (4) piston removal is
similar.
Figure 27
Brake hose
locator clip
44.
Remove the brake hose locator clips.
Figure 28
Steering Knuckle
45.
Remove the wheel sensors from both
front Steering Knuckles.
Wheel sensor
Figure 29
12/62
ITB22-038B
46.
Detach the wheel sensor harnesses from the two (2) locations they are attached to on
each steering knuckle bracket (Figure 30).
Figure 30
Top steering
knuckle nut and bolt
47.
Remove the top steering knuckle nuts
and remove both bolts.
Figure 31
48.
Remove the Shock Absorber Arm to
the Transverse Link nuts and both
bolts.

AWD shown in Figure 32. The
2WD bolt is in the same location.
Shock Absorber Arm
Link nut and bolt
Figure 32
13/62
ITB22-038B
49.
Raise the vehicle to a comfortable height to disconnect the undercarriage
components.
50.
Remove the two (2) nuts and bolts that
connect the Exhaust Front Tube to the
Center Muffler, where shown in
Figure 33.

51.
52.
For AWD vehicles, the Center
Muffler will remain attached to the
vehicle.
For 2WD only, remove the complete
propeller shaft from the vehicle.

Exhaust
Front Tube
Nuts and
bolts (2)
Refer to the ESM: REPAIR >
TRANSMISSION & DRIVELINE >
DRIVELINE > REMOVAL AND
INSTALLATION > REAR
PROPELLER SHAFT
Center
Muffler
Figure 33
For AWD vehicles, remove the four (4)
nuts and bolts that connect the
propeller shaft to the transmission,
and then disconnect the propeller
shaft from transmission.

The propeller shaft will remain
attached to the final drive.

One (1) hidden nut/bolt in
Figure 34.
Figure 34
53.
Disconnect the transmission's Control Rod.

Remove the Snap Pin to separate the Control Rod.
AWD
2WD
Snap Pin
Snap pin
Control Rod
Control Rod
Figure 35
14/62
ITB22-038B
Steering shaft
54.
Remove one (1) bolt, and then
disconnect the steering shaft from the
steering rack.
HINT: The bolt location and
component view may differ based on
the type of steering system.
Steering rack
Figure 36
55.
Disconnect the power steering wiring
harness connector, if present.

Electric power steering type shown
in Figure 37.

Located on either the driver (LH)
side or passenger (RH) side of the
front corner of the front suspension
member.
Figure 37
56.
Detach the A/T fluid cooler hoses.
A/T fluid
cooler hoses
Figure 38
15/62
ITB22-038B
57.
If the vehicle has an oil cooler, disconnect Oil Cooler Hose 1 and Oil Cooler Hose 2.
Oil Cooler
Hose 1
Oil Cooler
Hose 2
Figure 39
58.
Figure 40
Place a driveline support table under
the driveline, and raise to support the
driveline.
Figure 41
16/62
ITB22-038B
59.
Remove the four (4) rear engine mounting member bolts (Figure 42).
60.
Remove the front suspension member nuts and bolts indicated in Figure 42.




AWD has a total of four (4) front suspension member nuts.
2WD has two (2) front suspension member nuts.
Two (2) front suspension member bolts (both AWD and 2WD).
AWD only: Two (2) front cross bar bolts.
HINT: Figure 42 is of an AWD vehicle. Nut and bolt locations are similar for 2WD.
Front suspension
member bolts (2).
All grades.
Front suspension
member nuts:
 AWD (total of 4)
 2WD (2)
AWD only
Front suspension
member nuts (2)
AWD only
Front cross bar
bolts (2)
Rear engine
mounting member
bolts (4).
All grades.
Figure 42
17/62
ITB22-038B
61.
For AWD vehicles, remove the four (4) transverse link bolts; two (2) per side.
Transverse link
bolts (2 per side)
Figure 43
62.
Carefully lower the complete driveline away from the vehicle.
18/62
ITB22-038B
Remove the Passenger (RH) Side Turbocharger
63.
Loosen the Air Inlet Hose clamp shown in Figure 44. This hose will be detached in
step 80 on page 24.
64.
Release the spring clamps and disconnect the two (2) associated hoses, shown in
Figure 44.
65.
Disconnect the wiring harness connector shown in Figure 44.
Hose clamp
Hoses (2)
Wiring harness
connector
Figure 44
66.
Unplug the A/F sensor wiring harness connector, and then remove the A/F sensor
from the turbocharger housing.
67.
If present, unplug the Turbocharger Exhaust Gas Temperature Sensor (Bank 1) wiring
harness connector, and then remove the sensor from the turbocharger housing.
Harness connector
A/F sensor
Figure 45
19/62
ITB22-038B
68.
Remove the turbocharger Heat Insulator (upper).
Heat Insulator
(upper)
Heatshield
bolts (5)
Figure 46
69.
Remove the two (2) exhaust mount bolts shown in Figure 47.
Exhaust mount
bolts (2)
Figure 47
20/62
ITB22-038B
70.
Remove the three (3) nuts that connect the Catalyst Converter (bank 1) to the 2nd
Catalyst Converter (bank 1).
Catalyst Converter
nuts (3)
Figure 48
71.
Remove the Catalyst Converter (bank 1) support bracket bolt.
Support
bracket bolt
Figure 49
21/62
ITB22-038B
72.
Release the spring clamp and disconnect the associated coolant hose shown in
Figure 50.
73.
Remove the water tube bracket bolt (Figure 50).
Coolant hose
Water tube
bracket bolt
Figure 50
74.
If present, disconnect the Turbocharger Speed Sensor (Bank 1) wiring harness
connector (not shown).
75.
Loosen the turbocharger assembly mounting nuts in order, from 1 to 4, as shown in
Figure 51.
76.
Remove the band clamp bolt.
Turbocharger
mount nuts (4)
2
4
1
3
Band clamp
bolt
Figure 51
22/62
ITB22-038B
77.
Detach Catalyst Converter (bank 1) from the turbocharger outlet.
78.
Release the spring clamp and disconnect the associated oil return hose shown in
Figure 52.
Oil return hose
Figure 52
79.
Remove the eye bolt retaining the oil feed tube.
Eye bolt
Figure 53
23/62
ITB22-038B
80.
Detach the Air Inlet Hose from the turbocharger.
81.
Gently remove the turbocharger from its mounting studs so that the oil line mounting
bracket bolt can be reached (Figure 54).
82.
Remove the oil feed tube mounting bracket bolt shown in Figure 54.
Oil feed tube mounting
bracket bolt
Figure 54
83.
Remove the turbocharger from the engine and place it on a clean workbench.
24/62
ITB22-038B
Reinstall the Passenger (RH) Side Turbocharger
84.
Transfer the components from the old to the new turbocharger assembly and torque
to the specifications below.
IMPORTANT: Refer to PARTS INFORMATION for single use parts.

Water tube eye bolt torque: 25.0 N•m (2.6 kg-m, 18 ft-lb)
HINT: One (1) Water tube eye bolt is hidden in Figure 55.

Bracket bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

Oil Return Pipe 1 bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

Heat Insulator (lower) bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

If present, Turbocharger Speed Sensor (bank 1):
o Wiring harness connector bracket to turbocharger torque: 7.0 N•m (0.71 kg-m,
62 in.-lb)
o Wiring harness connector to bracket torque: 2.2 N•m (0.22 kg-m, 19 in.-lb)
Bracket
bolts (2)
Water tube
eye bolts (2)
Heat Insulator
(lower) bolts (2).
1 hidden in Figure
Oil Return Pipe 1
bolts (2).
1 hidden in Figure
Figure 55
25/62
ITB22-038B
85.
Install and temporarily tighten the eye bolt for the oil line, with a new gasket
(Figure 56).
86.
Reattach the oil feed tube mounting bracket with bolt (Figure 56) and torque to
specification.

Bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)
Oil feed tube mounting
bracket bolt
Eye bolt
Figure 56
87.
Align the turbocharger Air Inlet Hose 1 (bank 1) with the turbocharger output, and then
slide the turbocharger onto its mounting studs.

Leave the turbocharger Air Inlet Hose 1 (bank 1) clamp loose at this time.

Replace the turbocharger to cylinder head gasket with a new part from PARTS
INFORMATION.
Air Inlet Hose
1 (bank 1)
Figure 57
26/62
ITB22-038B
88.
Reconnect the oil return hose and spring clamp.
Oil return hose
Figure 58
89.
Install all four (4) turbocharger mount nuts, and then torque them in the order (from 1
to 6) shown in Figure 59.

Nut torque: 30.5 N•m (3.1 kg-m, 22 ft-lb)
90.
Align the Catalyst Converter (bank 1) with 2nd Catalyst Converter (bank 1) studs and
install the nuts finger tight. See PARTS INFORMATION for new gasket.
91.
Reattach the Catalyst Converter (bank 1) to the turbocharger outlet, and then lightly
tighten the band clamp bolt enough to align catalyst, but allow it to rotate.
Turbocharger
mount nuts (4)
3
1, 5
4
2, 6
Band clamp
bolt
Figure 59
27/62
ITB22-038B
92.
Install the catalyst converter support bracket bolt and torque to specification.

Bolt torque: 47.8 N•m (4.9 kg-m, 35 ft-lb)
Support
bracket bolt
Figure 60
93.
Torque the Catalyst Converter (bank 1) to the turbocharger outlet band clamp bolt to
specification.

94.
Bolt torque: 15 N•m (1.5 kg-m, 11 ft-lb)
Torque the oil feed tube eye bolt to specification.

Bolt torque: 25.0 N•m (2.6 kg-m, 18 ft-lb)
Eye bolt
Oil feed tube
Figure 61
28/62
ITB22-038B
95.
Reinstall the water tube bracket bolt (Figure 62) and torque to specification.

96.
Bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)
Reinstall the coolant hose and its spring clamp (Figure 62).
Coolant hose
Water tube
bracket bolt
Figure 62
97.
Reinstall the two (2) exhaust mount bolts shown in Figure 63 finger tight.
Exhaust mount
bolts (2)
Figure 63
29/62
ITB22-038B
98.
Torque the Catalyst Converter (bank 1) to 2nd Catalyst Converter (bank 1) nuts that
were finger tightened, in step 90 on page 27, to specifications.

99.
Nut torque: 44.9 N•m (4.6 kg-m, 33 ft-lb)
Torque the two (2) exhaust mount bolts installed finger tight in step 97 on page 29 to
specification.

Bolt torque: 44.9 N•m (4.6 kg-m, 33 ft-lb)
Catalyst Converter
nuts (3)
Figure 64
100. Reinstall Heat Insulator (upper) with five (5) bolts.

Bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)
Heat Insulator
(upper) bolts (5)
Heat Insulator
(upper)
Figure 65
30/62
ITB22-038B
101. Install a new A/F sensor from PARTS INFORMATION, torque it to specification and
then reconnect its wiring harness connector.

A/F sensor torque: 50 N•m (5.1 kg-m, 37 ft-lb)
Wiring harness
connector
A/F sensor
Figure 66
102. Tighten the hose clamp (Figure 67).
103. Reconnect the two (2) hoses (Figure 67).
104. Reconnect the wiring harness connector (Figure 67).
105. If the Turbocharger Exhaust Gas Temperature Sensor (bank 1) wiring harness
connector was disconnected in step 74 on page 22, then reconnect it.
Hose clamp
Hoses (2)
Wiring harness
connector
Figure 67
31/62
ITB22-038B
Remove the Driver (LH) Side Turbocharger
106. Loosen the hose clamp shown in Figure 68. This hose will be detached in step 124 on
page 36.
107. Release the spring clamps and disconnect the three (3) associated hoses, shown in
Figure 68.
108. Disconnect the wiring harness connector shown in Figure 68.
Hoses (3)
Hose clamp
Wiring harness
connector
Figure 68
109. Unplug the A/F sensor wiring harness connector, and then remove the A/F sensor
from the turbocharger housing.
A/F sensor
Harness connector
Figure 69
32/62
ITB22-038B
110. If present, unplug the Turbocharger Exhaust Gas Temperature Sensor (Bank 2) wiring
harness connector, and then remove the sensor from the turbocharger housing.
111. Remove the turbocharger Heat Insulator (upper).
Heat Insulator
(upper)
Heatshield
bolts (4)
Figure 70
112. Remove the two (2) nuts that connect the Catalyst Converter (bank 2) to the 2nd
Catalyst Converter (bank 2).
Catalyst Converter
nuts (2)
Figure 71
33/62
ITB22-038B
113. Remove the Catalyst Converter (bank 2) support bracket bolt.
Support
bracket bolt
Figure 72
114. Remove the 2nd Catalyst Converter (bank 2) support bracket bolt.
Support
bracket bolt
Figure 73
34/62
ITB22-038B
115. Loosen the turbocharger assembly mounting nuts in order, from 1 to 4, as shown in
Figure 74.
116. Remove the band clamp bolt.
4
Turbocharger
mount nuts (4)
2
1
3
Band clamp
bolt
Figure 74
117. Detach Catalyst Converter (bank 2) from the turbocharger outlet.
118. Release the spring clamp and disconnect the associated oil return hose shown in
Figure 75.
Oil return hose
Figure 75
35/62
ITB22-038B
119. Remove the eye bolt retaining the oil feed tube.
Eye bolt
Figure 76
120. Remove both the A/C High-Pressure Flexible Hose and then the Low-Pressure Pipe 2
from the A/C compressor (Figure 77).
121. Remove the Oil Feed Tube mounting bracket bolt shown in Figure 77.
Low-Pressure
Pipe 2
Oil Feed Tube mounting
bracket bolt
High-Pressure
Flexible Hose
A/C
compressor
Figure 77
122. If present, disconnect the Turbocharger Speed Sensor (Bank 2) wiring harness
connector.
123. Remove the turbocharger from the engine and place it on a clean workbench.
36/62
ITB22-038B
124. Transfer the components from the old to the new turbocharger assembly and torque
to the specifications below.
IMPORTANT: Refer to PARTS INFORMATION for single use parts.

Water tube eye bolt torque: 25.0 N•m (2.6 kg-m, 18 ft-lb)
HINT: One (1) Water tube eye bolt is hidden in Figure 55.

Bracket bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

Oil return pipe bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

Heat insulator (lower) bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)

If present, Turbocharger Speed Sensor (bank 2):
o Wiring harness connector bracket to turbocharger torque: 7.0 N•m (0.71 kg-m,
62 in.-lb)
o Wiring harness connector to bracket torque: 2.2 N•m (0.22 kg-m, 19 in.-lb)
Bracket
bolts (2)
Water tube
eye bolts (2)
Heat insulator
(lower) bolts (3).
1 hidden in Figure
Oil return pipe bolts (2).
1 hidden in Figure
Figure 78
37/62
ITB22-038B
Reinstall the Driver (LH) Side Turbocharger
125. If present, reconnect the Turbocharger Speed Sensor (Bank 2) wiring harness
connector.
126. Install and temporarily tighten the eye bolt for the oil feed tube, with a new gasket
(Figure 79).
Eye bolt
Oil feed tube
Figure 79
127. Reattach the Oil Feed Tube mounting bracket bolt (Figure 80), and then torque to
specification.

Bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)
Oil Feed Tube
mounting bracket bolt
A/C
compressor
Figure 80
38/62
ITB22-038B
128. Align the turbocharger Air Inlet Hose 1 (bank 2) with the turbocharger output, and then
slide the turbocharger onto its mounting studs.

Leave the turbocharger Air Inlet Hose 1 (bank 2) clamp loose at this time.

Replace the turbocharger to cylinder head gasket with a new one from PARTS
INFORMATION.
129. Reconnect the wiring harness connector shown in Figure 81.
130. Reconnect the three (3) hoses shown in Figure 81.
Hoses (3)
Wiring harness
connector
Hose clamp
Figure 81
131. Reconnect the oil return hose and spring clamp.
Oil return hose
Figure 82
39/62
ITB22-038B
132. Install all four (4) turbocharger mount nuts, and then torque them in the order
(from 1 to 6) shown in Figure 83.

Nut torque: 30.5 N•m (3.1 kg-m, 22 ft-lb)
133. Align the Catalyst Converter (bank 2) with 2nd Catalyst Converter (bank 2) studs and
install the nuts finger tight.
134. Reattach the Catalyst Converter (bank 2) to the turbocharger outlet, and then lightly
tighten the band clamp bolt just enough to align catalyst, but allow it to rotate.

Band clamp will be torqued in step 138 on page 42.
1, 5
Turbocharger
mount nuts (4)
4
3
2, 6
Band clamp
bolt
Figure 83
40/62
ITB22-038B
135. Reinstall the 2nd Catalyst Converter (bank 2) support bracket bolt finger tight.
Support
bracket bolt
Figure 84
136. Reinstall the Catalyst Converter (bank 2) support bracket bolt finger tight.
Support
bracket bolt
Figure 85
41/62
ITB22-038B
137. Torque the Catalyst Converter (bank 2) to the turbocharger outlet band clamp bolt to
specification.

Bolt torque: 15 N•m (1.5 kg-m, 11 ft-lb)
138. Torque the 2nd Catalyst Converter (bank 2) support bracket bolt to specification.

Bolt torque: 47.8 N•m (4.9 kg-m, 35 ft-lb)
139. Torque the Catalyst Converter (bank 2) support bracket bolt to specification.

Bolt torque: 47.8 N•m (4.9 kg-m, 35 ft-lb)
140. Torque the oil feed tube eye bolt (Figure 86) to specification.

Bolt torque: 25.0 N•m (2.6 kg-m, 18 ft-lb)
Eye bolt
Oil feed tube
Figure 86
42/62
ITB22-038B
141. Torque the Catalyst Converter (bank 2) to 2nd Catalyst Converter (bank 2) nuts that
were finger tightened, in step 134 on page 40, to specification.

Nut torque: 44.9 N•m (4.6 kg-m, 33 ft-lb)
Catalyst Converter
nuts (2)
Figure 87
142. Reinstall Heat Insulator (upper) with four (4) bolts.

Bolt torque: 9.0 N•m (0.92 kg-m, 80 in.-lb)
Heat Insulator
(upper)
Heatshield
bolts (4)
Figure 88
43/62
ITB22-038B
143. Install a new A/F sensor from PARTS INFORMATION, torque it to specification and
then reconnect its wiring harness connector.

A/F sensor torque: 50 N•m (5.1 kg-m, 37 ft-lb)
A/F sensor
Harness connector
Figure 89
144. Tighten the hose clamp shown in Figure 90.
Hose clamp
Figure 90
44/62
ITB22-038B
145. Reattach the Low-Pressure Pipe 2 and then the A/C High-Pressure Flexible Hose to
the A/C compressor (Figure 91) and then torque to specification.

Nut torque: 13.7 N•m (1.4 kg-m, 10 ft-lb)
Low-Pressure
Pipe 2
A/C
compressor
High-Pressure
Flexible Hose
Figure 91
Reinstall Driveline
146. Carefully raise the driveline back into the vehicle.
147. For AWD vehicles, reinstall the four (4) transverse link bolts; two (2) per side, and
temporarily tighten.

These bolts will be torqued to specification in step 153 on page 47.
Transverse link
bolts (2 per side)
Figure 92
45/62
ITB22-038B
148. Reinstall and temporarily tighten the following nuts and bolts indicated in Figure 93.





AWD has a total of four (4) front suspension member nuts.
2WD has two (2) front suspension member nuts.
Two (2) front suspension member bolts (both AWD and 2WD).
AWD only: Two (2) front cross bar bolts.
The rear engine mounting member bolts.
HINT: Figure 93 is of an AWD vehicle. Nut and bolt locations are similar for 2WD.
Front suspension
member bolts (2).
All grades.
Front suspension
member nuts:
 AWD (total of 4)
 2WD (2)
AWD only
Front suspension
member nuts (2)
AWD only
Front cross bar
bolts (2)
2
3
Rear engine
mounting member
bolts (4).
All grades.
4
Figure 93
1
149. Torque the sub frame nuts, bolts, and front cross bar bolts to the following
specifications:



Torque the front suspension member nuts to 130 N•m (13 kg-m, 96 ft-lb).
Torque the front suspension member bolts to 82 N•m (8.4 kg-m, 60 ft-lb).
Torque the front cross bar bolts to 75 N•m (7.7 kg-m, 55 ft-lb).
150. Torque the rear engine mounting member bolts in the pattern shown in Figure 93.

Bolt torque: 49 N•m (5.0 kg-m, 36 ft-lb).
46/62
ITB22-038B
151. For AWD vehicles, torque the four (4)
transverse link bolts; two (2) per side,
to specification.

Bolt torque: 128 N•m (13 kg-m,
94 ft-lb)
Transverse link
bolts (2 per side)
Figure 94
152. Slowly lower, and then remove, the
driveline support table from under the
driveline.
Driveline
support table
Figure 95
153. Raise the vehicle to a comfortable height for the following steps.
154. Reattach the A/T fluid cooler hoses.
A/T fluid
cooler hoses
155. Reconnect Oil Cooler Hose 1 and Oil
Cooler Hose 2 if they were
disconnected in step 57 on page 16.
47/62
Figure 96
ITB22-038B
156. Reconnect the power steering wiring
harness connector, if present.
HINT: Electric power steering type
shown in Figure 37.

Located on either the driver (LH)
side or passenger (RH) side of the
front corner of the front suspension
member, under the inner fender
protector.
Figure 97
Steering shaft
157. Reconnect the steering shaft to the
steering rack, and then install the bolt.

Bolt torque: 26.5 N•m (2.7 kg-m,
20 ft-lb)
HINT: The bolt location and
component view may differ based on
the type of steering system.
Steering rack
Figure 98
158. Reconnect the transmission's Control Rod with Snap Pin.
AWD
2WD
Snap Pin
Snap pin
Control Rod
Control Rod
Figure 99
48/62
ITB22-038B
159. For 2WD only, reinstall the propeller shaft and complete exhaust into the vehicle, and
then skip to step 163.

Refer to the ESM: REPAIR > TRANSMISSION & DRIVELINE > DRIVELINE >
REMOVAL AND INSTALLATION > REAR PROPELLER SHAFT
160. For AWD vehicles, reconnect the
propeller shaft to the transmission with
four (4) nuts and bolts, and then
torque to specification.

Torque to 80 N•m (8.2 kg-m,
59 ft-lb).

One (1) hidden nut/bolt in
Figure 100.
Figure 100
Exhaust
Front Tube
161. Reconnect the Exhaust Front Tube to
the Center Muffler with a new gasket
and two (2) nuts and bolts
(Figure 101), and then torque to
specification.

Torque to 58 N•m (5.9 kg-m,
43 ft-lb).

See PARTS INFORMATION for
single use parts.
Nuts and
bolts (2)
Center
Muffler
Figure 101
162. Reinstall all Under Covers.
163. Lower the vehicle to a comfortable height to reassemble the suspension and brake
components.
49/62
ITB22-038B
The following steps will be performed on both the passenger (RH) side and the driver (LH)
side of the vehicle. The figures are of the RH side. The LH side is similar.
164. Reattach both Shock Absorber Arms to the Transverse Links with nuts and fasteners,
and then torque to the specifications below.


For AWD torque, refer to Figure 102.
For 2WD torque, refer to Figure 103.
Shock Absorber Arm
Link nut and fastener
Figure 102
Figure 103
Upper Link
165. Reattach the top of the Steering
Knuckle to the Upper Link, and then
torque to specification.

Torque to 55 N•m (5.6 kg-m,
41 ft-lb).
Steering Knuckle
Figure 104
Brake caliper
assembly
166. Reattach both brake rotors and caliper
assemblies, and then torque bolts to
specification.

Brake rotor
For 2 or 4 piston calipers, torque
bolts to 123 N•m (13 kg-m,
91 ft-lb).
Figure 105
50/62
ITB22-038B
Brake hose
locator clip
167. Reattach the brake hose locator clips.
Figure 106
Steering Knuckle
168. Reattach the wheel sensors to both
Steering Knuckles.

Bolt torque: 9 N•m (9.2 kg-m,
80 in.-lb)
Wheel sensor
Figure 107
169. Reattach the wheel sensor harnesses to the two (2) locations, on each Steering
Knuckle, shown in Figure 108.
Figure 108
51/62
ITB22-038B
170. Lower the vehicle to a comfortable height to work in engine room.
High-Pressure
Flexible Hose
171. Reattach the High-Pressure Flexible
Hose to the condenser.

One (1) bolt.

Bolt torque: 5.5 N•m (0.56 kg-m,
49 in.-lb)
Bolt (1)
Figure 109
Low-Pressure
Flexible Hose
172. Reconnect the Low-Pressure Flexible
Hose to the Internal Heat Exchanger
Pipe.

One (1) bolt.

Bolt torque: 5.5 N•m (0.56 kg-m,
49 in.-lb)
Bolt (1)
Figure 110
Radiator Hose
(lower)
173. Reattach the Radiator Hose (lower)
and the Reservoir Tank Hose to the
Multi-way Control Valve.
Reservoir
Tank Hose
Figure 111
52/62
ITB22-038B
174. For vehicles that the Oil Cooler Pipe 1 bolts were removed in step 37 on page 10,
reinstall the two (2) bolts.

Bolt torque: 5.5 N•m (0.56 kg-m, 49 in.-lbs)
175. Remove the tape from over Air Duct (bank 1) and Air Duct (bank 2) inlets.
176. Reattach both Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2) to Air Duct
(bank 1) and Air Duct (bank 2), and then install their bolts; a total of four (4).

Bolt torque: 5.5 N•m (5.6 kg-m, 49 in.-lb)
177. Reattach the MAF sensor wiring harnesses to Air Cleaner Body (bank 1) and Air
Cleaner Body (bank 2).
178. Reconnect both MAF sensor wiring harness connectors to the MAF sensors
(Figure 112), located on the Air Cleaner Body (bank 1) and Air Cleaner Body (bank 2).
Air Cleaner
Body (bank 1)
Bolts (4)
MAF sensors
Air Cleaner
Body (bank 2)
Figure 112
179. Reattach the passenger (RH) side and the driver (LH) side Hood Side Seal Assembly
clips (Figure 113).
Hood Side Seal
Assemblies
Clips
Figure 113
53/62
ITB22-038B
Radiator Hose
(Upper)
180. Reconnect the Radiator Hose (Upper)
to the radiator.
Radiator
Figure 114
Reservoir Tank
Hose
181. Reconnect the Radiator Hose (Upper)
and the Reservoir Tank Hose to the
Multi-way Control Valve.
Multi-way
Control Valve
Radiator Hose
(Upper)
Figure 115
182. Install the Air Duct (inlet), shown in Figure 116.

Eight (8) clips.
Air Duct (inlet)
Clips (8)
Figure 116
54/62
ITB22-038B
183. Reconnect Water Hose 9 to Water
Pipe 3.
Water Pipe 3
Water Hose 9
Figure 117
184. Reconnect Water Hose 1 to Connector
Pipe 3.
Connector Pipe 3
Water Hose 1
Figure 118
185. Reattach Fuel Feed Hose 2.
Fuel Feed Hose 2
Figure 119
55/62
ITB22-038B
186. Reconnect both the passenger (RH) side and the driver (LH) side heater hoses to the
engine (Figure 120 and Figure 121).
187. Reinstall the two (2) bolts retaining the engine room wiring harness bracket
(Figure 120).

Bolt torque: 13.5 N•m (1.4 kg-m, 10 ft-lb)
Passenger (RH) side
heater hose
Figure 120
Driver (LH) side
heater hose
Figure 121
188. Reattach the body ground cable (Figure 122) and the engine ground cable
(Figure 123).

The body ground cable is located on the driver (LH) side of the engine room inner
fender.

The engine ground cable is located on the front of the timing cover.
Body
ground cable
Engine
ground cable
Figure 122
Figure 123
56/62
ITB22-038B
189. Reattach the positive battery cable
grommet to the vehicle.
190. Reconnect the engine wiring harness
to its mounting bracket.
Positive battery
cable grommet
Mounting
bracket
Figure 124
Positive battery
cable nut
191. Reattach the positive battery cable to
the battery terminal with fusible link.

Nut torque: 13.5 N•m (1.4 kg-m,
10 ft-lb)
Battery terminal
with fusible link
Figure 125
Positive
battery cable
192. Reconnect the three (3) wiring harness connectors shown in Figure 126.
Wiring harness
connectors (3)
Figure 126
57/62
ITB22-038B
193. Reconnect the ECM wiring harness connectors (3).
ECM wiring harness
connectors (3)
Figure 127
Vacuum Hose 1
Vacuum piping
194. Reconnect the Vacuum Hose 1 to the
vacuum piping (Figure 128), and then
reattach its grommet to the bulkhead.
Grommet
Figure 128
195. Reattach the Engine Control Harness
grommet to the bulkhead.
Engine Control
Harness grommet
Figure 129
58/62
ITB22-038B
196. Reattach the two (2) Engine Control Harness mounting clips (Figure 130).
197. Reconnect the wiring harness connector (Figure 130).

Located directly behind the battery.
Wiring harness
connector
Wiring harness
mounting clips (2)
Figure 130
198. Reconnect the Engine Control
Harness from the Engine Room
Harness (Figure 131).
Engine Control Harness / Engine
Room Harness connector
Figure 131
199. Roll down the wiring harness dust boot (Figure 132).
200. Reconnect the wiring harness connector shown in Figure 132.
Wiring harness
connector
Dust boot
Figure 132
59/62
ITB22-038B
201. Refill the engine coolant.
202. Refill Intercooler coolant.
203. Reconnect the battery cable to the positive terminal.

Nut torque: 13.5 N•m (1.4 kg-m, 10 ft-lb)
204. Reinstall the cover of the battery positive terminal.
205. Reconnect the battery cable to the negative terminal.

Nut torque: 13.5 N•m (1.4 kg-m, 10 ft-lb)
206. Reinstall the Cowl Top Cover RH and Cowl Top Cover LH.

Refer to the ESM: REPAIR > BODY EXTERIOR, DOORS, ROOF & VEHICLE
SECURITY > EXTERIOR > REMOVAL AND INSTALLATION > COWL TOP
207. Reinstall the Engine Cover.

Refer to the ESM: REPAIR > ENGINE > ENGINE MECHANICAL > REMOVAL
AND INSTALLATION > ENGINE COVER
208. Perform Turbocharger Wastegate Control Solenoid Valve Data Initialization.

Refer to the ESM: DIAGNOSIS > ENGINE > ENGINE CONTROL SYSTEM >
BASIC INSPECTION > ENGINE CONTROL SYSTEM > TURBOCHARGER
WASTEGATE CONTROL SOLENOID VALVE DATA INITIALIZATION
209. Perform Idle Air Volume Learning.

Refer to the ESM: DIAGNOSIS > ENGINE > ENGINE CONTROL SYSTEM >
BASIC INSPECTION > ENGINE CONTROL SYSTEM > IDLE AIR VOLUME
LEARNING
210. Is the APPLIED VEHICLE a 2016-2017 Q50 or 2017 Q60?
YES: Refer to ITB17-050 for required ECM reprogram for Exhaust Gas Temp Sensor
deletion, and then proceed to step 211.
NO: Proceed to step 211.
211. Recharge the A/C refrigerant using approved equipment.
212. Perform Required Procedure After Battery Disconnection.

Refer to the ESM: GENERAL INFORMATION > GENERAL INFORMATION >
BASIC INSPECTION > ADDITIONAL SERVICE WHEN REMOVING BATTERY
NEGATIVE TERMINAL
60/62
ITB22-038B
PARTS INFORMATION
(1)
(2)
DESCRIPTION
PART NUMBER
QUANTITY
TURBOCHARGER (LH)
(1)
1
TURBOCHARGER (RH)
(1)
1
GASKET - EYEBOLT
15189-5CA0A
6
EXHAUST NUT
14094-JG30A
8
HEAT SHIELD BOLT
14069-JD00A
14
TURBOCHARGER INLET GASKET
14415-5CA0A
2
TURBOCHARGER OIL INLET GASKET
15196-MB40B
1
TURBOCHARGER OIL OUTLET GASKET
15196-5CB0A
2
GASKET - EYEBOLT
15189-5CA0B
2
GASKET - EYEBOLT
11026-AD200
PROP BOLT (AWD)
37120-AL60A
PROP SHAFT NUTS (AWD)
37171-AL60A
PROP BOLT (2WD)
37120-AH00A
PROP WASHER (2WD)
37121-JK20B
PROP SHAFT NUTS (2WD)
37171-AL60A
CENTER BEARING MOUNTING BRACKET
NUTS (2WD)
FRONT SUSPENSION NUT
54588-JK03A
1
4
If Needed
4
If Needed
3
If Needed
3
If Needed
3
If Needed
2
If Needed
4
NUT
55269-AG00E
4
CLAMP
14464-5CA1A
4
EXHAUST GASKET
20692-8H30A
1
EXHAUST CLAMP
14464-5CB0A
2
CONVERTER GASKET
14445-5CB0A
2
COOLANT (2)
999MPL25500P
As Needed
AIR FUEL RATIO SENSOR
22693-5CA0A
2
CLAMP
01558-00451
2
01225-00062
Refer to the EPC and use vehicle VIN to look up grade specific part.
Order this item through the Infiniti Maintenance Advantage program: Phone 877-INFIMA1 (877-463-4621). Website order via link on the dealer portal; www.NNAnet.com
and click on the “Maintenance Advantage-Tire/Battery/Chemical” link.
Continued on the next page.
61/62
ITB22-038B
PARTS INFORMATION (continued)
DESCRIPTION
PART NUMBER
QUANTITY
SEAL - O RING
92472-N823A
2
SEAL - O RING
92474-N823A
1
SEAL - O RING
92473-N823A
1
SEAL - O RING
92471-N823A
1
NUT
20602-41G0A
5
GASKET EXHAUST
20691-19U0A
1
GASKET CONVERTOR
20813-5CA0A
1
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
Replace RH Turbocharger- RWD
SYM
DIA
FRT
7.8
DX62AA
With AWD
Replace LH Turbocharger- RWD
(1)
With AWD
Replace Both Turbochargers- RWD
DX63AA
7.4
ZE
7.8
32
7.4
8.8
DX64AA
With AWD
(1)
OP CODE
8.4
Reference the electronic parts catalog and use the Turbocharger Assy (14411-*****)
as the Primary Failed Part (PFP).
AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
DESCRIPTION
November 14, 2022
ITB22-038
Original bulletin published
December 9, 2022
ITB22-038A
PARTS INFORMATION revised
August 4, 2023
ITB22-038B
APPLIED VEHICLES, page 46, and PARTS
INFORMATION revised
62/62
ITB22-038B